单项选择题

Medical care reform has become this country's most important public health ______.

A．question
B．stuff
C．matter
D．issue
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单项选择题
It is said that the math teacher seems ______ towards bright students.
A．partial
B．beneficial
C．preferable
D．liable
单项选择题
This research has attracted wide coverage in the ______ and has featured on BBC television's Tomorrow's World.
A．message
B．source
C．media
D．data
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